Physics 11 – Today we continued with our investigation into mirrors. Students found the focal length of a mirror by projecting an image from a distant object. Next they were asked to find the image distance for a given object distance, using three different methods: direct measurement, calculation using the focal length, and doing a scaled ray diagram.
As I noted from last day in physics, I hoped that students could use a cooperative learning environment to successfully solve mirror problems. It turned out that the substitute felt that kids should work quietly and independently. Uh huh.
Physics 11 – Today was a very short day for me, as I had to go to the board offices for some training on our new SIS. It was a good test for the students though: I left a package on doing calculations for mirrors. The idea was to use the readings, worked examples, and student crowd sourcing to figure out how to do these types of questions. Once a student gets a correct answer to a question and feels comfortable with the solution, they put their name on the whiteboard and volunteer as a helper for that question.
Physics 11 – I had students try to project an image from a plane mirror on to a screen. I can be cruel at times. This leads to a discrepant event – what is a real image and what is a virtual image? I don’t let them struggle for too long…
Science 8 – My other grade 8 class did their dissection today. Above is a photo of the best example of a retina/optic nerve that we saw. I’ll keep this photo for other classes to see…
Science 8 – A highlight of the year is the sheep eye dissection. With minimal guidance, students were able to ethically and responsibly dissect the eye. My peer tutor was a fantastic help during this activity as there are a few places that kids have problems, most noticeably when puncturing through the eye the first time.
I got a chuckle from the kids after the lab when they told me that “finally, we got to do a lab.” Apparently a science lab isn’t a lab until animal parts are cut into!
Physics 11 – May 26
Students are now applying their understanding of refraction through the use of lenses and creating images. Again, I focus on the ray diagrams for my formative assessment.
Physics 11 – May 22
Students learned more about refraction today and doing ray diagrams for refraction. Here I used some curved acrylic to demonstrate total internal reflection.